Science Answer In One word.

No, it is not a chemical change. We just separated the skin of the banana and there is no change is its composition..

Growing of nail is a periodic change, because it occurs periodically at regular intervals.

Yes, solar eclipse is a periodic change as it occurs after a definite interval of time.

Evaporation

1. Physical change
2. Endothermic (heat energy is absorbed)

Physical change.

Irreversible chemical change.

Reversible.

Burning of magnesium ribbon and burning of a candle.

Seasonal changes, motion of hands of a clock.

No, it is not a chemical change. We just separated the skin of the banana and there is no change is its composition..

When we mix baking soda with lemon juice we can hear a hissing sound when bubbles of carbon di oxide coming out and rising is the reaction vessel.

Freezing and condensation.

Melting, vaporization and sublimation.

Sodium hydrogen carbonate + citric acid → sodium citrate + carbon di oxide+ water.

Physical contact of the substances, heat, light, electricity and pressure.

Nickel, platinum or palladium.

Yes, conversion of milk into ice-cream is a chemical change. Since properties of ice-cream are different from the milk

Crystals are solids in their purest form that have definite geometrical shapes.

Lustre, malleability, ductility, density, viscosity, solubility mass and volume.